Can’t use explorer open library in MOSS.

I saw a message when I tried to open a library with Windows Explorer in the MOSS.

 

The message is…

 

I found some body talking about it too, but their method not work for me.

even the hot-fix from Microsoft didn’t work for me.

http://www.microsoft.com/downloads/details.aspx?FamilyId=17C36612-632E-4C04-9382-987622ED1D64&displaylang=en

 

Windows 2008 Enterprise, Office 2007, Microsoft Office SharePoint Server 2007, IE7